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US 12,365,171 B2Granted
Multi-layered article
AssigneeQinetiq Limited
InventorsChristopher Douglas James Spooner, Emma Jane Newton, Robert Nathan Williams, Louisa Alice Laing, Lyn David Jones, Lloyd Morris Wye
Life of this patent
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Abstract
Multi-layered articles or products comprising layers of filled polymer compositions, methods of making and applications or uses thereof.
Claims19
A multi-layered radio frequency (RF) lens article or RF lens product comprising at least two layers, wherein:
- at least one of the at least two layers is a polymer composition comprising a polymer and a filler material, wherein the filler material comprises titanium dioxide (TiO2) and the polymer is selected from any one or more of:
- high density polyethylene (HDPE), cyclic olefin copolymer (COC), polyphenylene ether (PPE), polypropylene (PP), and fluorinated ethylene propylene (FEP);
- and
- another one of the at least two layers is a foamed polymer layer, wherein the foamed polymer layer:
- is a HDPE or PP foam layer;
- is shaped to have doubly curved surfaces or to have parts of continuously varying section thickness;
- and
- comprises voids that are distributed throughout the entirety of the HDPE or PP such that it has homogenous structure and non-varying density.
5 more elements
Dependencies are inferred from the claim text.